A thorough look at Tajikistan from the Country Studies section of the Library of Congress. Read about its history, economy, people, and government. Information through the 1990s.
This article from the Library of Congress addresses the sad state of the environment in Uzbekistan caused by chemical, water, and air pollution. Particular emphasis is focused on the Aral Sea.
Read about the geography of Uzbekistan from the Library of Congress collection. The topography is varied and often severe.
The full text of Richard Sheridan's "The Critic." Includes an introduction with information on Sheridan's life and works.
Genes are actually a specific sequence of DNA and they have a clear start and stop. Learn about the discovery and sequencing of genes at this site. This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page.
This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page. The topic is the human genome.
Alfred Sturtevant will describe his gene mapping research with fruit flies. This animated explanation will show how he bred fruit flies to determine the proximity of genes.
The scientists and experiments that discovered that DNA is coiled into chromosomes are the topic of this article. Article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page.
This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page. The topic is the study of cell division, mitosis, and cell death.
Long after Gregor Mendel knew that something controlled heredity three other scientists finally put his research together with new evidence from microscopes to determine that genes do exist. This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page.
Recombinant DNA technology has made it possible to gain insight into how genes work. This concept is further developed in this article with an animated explanation, art gallery, audio/video interviews, biographies, and an interactive problem to solve. An exciting, interesting way to learn about rDNA!
This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page. Here you can see how common genes are evidence for common ancestors.
Early research showed that genes code for proteins. This was based on studies using mutant strains of bread mold. This multimedia article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page.
An animated pedigree clearly explains the way hemophilia was inherited in the Romanov family. Interpreting pedigrees and sex-linked crosses should be much easier to understand after going through this tutorial.
Experiments found that DNA could sometimes recover from damage. This article illustrates how the discovery was made. Article includes animations, pictures, video, biographical information, and quiz questions that are accessed by clicking on buttons along the bottom of the page.
Theodore Boveri will describe his research with worms that helped him discover the principles of meiosis. The animations of meiosis are really good.
In this video segment adapted from NOVA, scientists search for carbonized remains of plants preserved in lava flows to find out how long it has taken rain forests on Hawaii to regenerate after a volcanic eruption.
Site from Ibiblio.org on the exhibit at the Library of Congress in Washington, DC. Contains information on the history of the scrolls, an extensive explanation of each scroll, and pictures.
In this lesson, students learn that sound is energy and has the ability to do work. Students discover that sound is produced by a vibration and they observe soundwaves and how they travel through mediums. They understand that sound can be absorbed, reflected or transmitted. Through associated activities, videos and a PowerPoint presentation led by the teacher, students further their exploration of sound through discussions in order to build background knowledge.
Students explore the relationship between two quantitative variables in bivariate data using various x-y plots. They compare the relationships for several categories on the same plot. Students calculate the correlation coefficient to measure the strength and direction of the linear relationship that might exist between two variables.